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Severe BHV-1 outbreak in a naive dairy herd in northwest Spain

Severe BHV-1 outbreak in a naive dairy herd in northwest Spain

The commercial dairy herd is located in Galicia (North West of Spain), a densely populated region with farms that average a capacity of 40 cows. This is a large herd with 400 Holstein dairy cows (250 milking) and it is engaged in a voluntary regional health program for the control and eradication of IBR, BVD, Neospora and Johne’s disease since 2005. This farm has regularly vaccinated for BVD, following an every 6 months booster dose protocol, and it was considered to be free of IBR according to yearly serology control for IBR and bulk tank milk analysis followed in the region.

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Дата

12 сент. 2016 г.

Общий обзор

Currently this herd is on a six monthly program with HIPRABOVIS® IBR Marker Live protocol for the prevention of IBR, with a double primo-vaccination in the young heifer calves at 3 months of age and booster vaccinations in the adults every 6 months. The farm IBR status is regularly monitored by bulk milk tank sampling every 6 months and every 12 months by the sampling and IBR gE serology of 12-24 months old heifers. The bulk milk tank samples still being positive as it is expected due to the consequential new seropositive animals arisen owning to the outbreak. Regarding the blood sampling, 50% of these animals sampled came back IBR positive six months after the outbreak as a consequence of its infection during this period, when they were younger calves, but no new young heifers appeared positive afterwards. No more clinical cases of IBR have been detected and the epidemiologic situation of IBR is now under control.